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Darren_Santilli

pro-circuit 304

2 posts in this topic

I recently bought a used exhaust for my 2000WR and was told it was a "pro-circuit T4", but its actually a "pro-circuit 304 factory sound" system, meant for a '99 YZ.

Is it still ok for my bike?

Thanks

Darren

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I've got the same 304 system on my 99 WR400. It works great but no better than any other aftermarket system. Unfortunately, Procircuit does not offer a spark arrester for the 304.

I made my own SA so it now passes the "stick test".

I tried to fit other manufacturers exhausts (FMF, WhiteBros, etc) to the header, but the 204's header angle does not match up.

Hope this helps.

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